In the past it was reported that beginning at 40, typically, people lose 8% or more of their muscle mass each decade.This leads to loss of strength, mobility, muscle tone and energy as you age.

Now, according to the New York Times, the beliefs about this process are changing. Exercise may help you write a different end-story.

In the November issue of the doctors paper, The Physician and Sport Medicine Journal, they cited a study where runners, cyclist, and swimmers in four age groups (40-70 plus) who were fit and exercising 4-5 times per week, didn’t lose their muscle mass, leg strength and body-fat composition at a high rate, like previously believed.

There was a slight leg-muscle strength reduction, but it wasn’t a significant amount.

Exercise enthusiast and orthopedists are optimistic about the new data.It shows that muscle deterioration isn’t inevitable, but is actually caused by inactivity.This re-enforces the importance of consistent exercise as a life-choice for a healthy, energetic lifetime.